JP3675232B2 - Manufacturing method of perforated foil - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a perforated foil used for an electrode of a Li-ion battery, and more particularly to efficiently use a perforated foil having a large degree of freedom in the size and pitch of holes without incurring high costs. The present invention relates to a method for manufacturing a perforated foil.
[0002]
[Prior art]
As a method for producing a perforated foil, conventionally, a method of forming a hole by pressing using an uneven mold (referred to as punching metal) or a part of the material of the foil by chemical treatment such as etching. a method of forming a hole by dissolving is used.
[0003]
[Problems to be solved by the invention]
However, according to the conventional method of manufacturing punched foil by press working, it is necessary to combine the male and female dies with an accuracy of 1/10 of the material to be punched to prevent the generation of burrs during the press working. Therefore, especially when the material is a thin foil of 10 to 30 μm, in order to prevent the occurrence of burrs, a combination accuracy of 1 to 3 μm is required, which increases the cost of the mold and it is difficult to maintain the precision of the mold. , there is a problem that can not be reduced to the diameter and pitch of the holes punched.
[0004]
On the other hand, according to the conventional manufacturing method of perforated foil by chemical treatment, masking is performed before chemical treatment, holes are formed by chemical treatment, and many steps such as peeling masking after hole formation are required. takes a long production time, there is a problem that the cost according to the processing and maintenance of the liquid used for the chemical treatment.
[0005]
Accordingly, an object of the present invention is to provide a method for manufacturing a perforated foil capable of efficiently manufacturing a perforated foil having a high degree of freedom such as the size and pitch of holes without incurring high costs. There is.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a method for manufacturing a perforated foil in which a predetermined pattern of holes is formed in a metal foil.
An elastic body that is deformed by pressurization and the metal foil are disposed on a base that is not deformed by pressurization,
There is provided a method for producing a perforated foil, wherein the metal foil on the elastic body is pressed by a grooved roll having a groove having a pattern corresponding to the predetermined pattern.
According to the said structure, when a foil is arrange | positioned and pressed between the roll with a groove | channel which has a groove | channel on the surface, and an elastic body, an elastic body will push a foil in a groove | channel, and the shearing force by the edge and the elastic body of a groove | channel A portion of the metal foil that contacts the surface portion of the groove member is extracted to form a hole.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
1A and 1B show a manufacturing apparatus according to an embodiment of the present invention, in which FIG. 1A is a side view, FIG. 1B is a cross-sectional view of a main part, and FIG. 1C is a development view of a roll surface. . This manufacturing apparatus 1 includes a grooved roll 2 having grooves 21 formed in a cross shape on the surface, and a base plate on which a metal foil 4 to be processed is placed on a flat surface 5a having high rigidity via an elastic body 3. And 5.
[0008]
On the surface of the grooved roll 2, as shown in FIG. 1C, a groove 21 having a width of 0.5 mm having two kinds of angles with respect to the roll axis direction, for example, 30 degrees and 150 degrees, is formed In addition, a roughly rhombic protrusion 22 exists between the intersecting grooves 21 and 21.
[0009]
As the elastic body 3, for example, hard rubber having a thickness of 3 mm is used.
[0010]
In the manufacturing apparatus 1 configured as described above, first, as shown in FIG. 1A, a metal foil 4 made of, for example, copper having a thickness of 30 μm is placed on a base plate 5 via an elastic body 3. When the grooved roll 2 is pushed into the elastic body 3, the elastic body 3 is deformed, and a force for pushing the foil 4 into the groove 21 of the roll 2 acts. As shown in FIG. 1 (b), the portion 4 a of the metal foil 4 pressed against the elastic body 3 by the protrusion 22 of the roll 2 becomes a roughly diamond-shaped punched residue, and is pushed into the groove 21 of the roll 2. The portion 4b of the metal foil 4 has a shape connected in a lattice shape. When the grooved roll 2 is rotated in this state, the metal foil 4 is sheared by the edge of the groove 21 and the elastic body 3. On the elastic body 3, a roughly diamond-shaped punched residue 4 a sheared by the protrusion 22 of the grooved roll 2 remains, and a portion 4 b of the grid-like metal foil 4 remains in the groove 21 of the grooved roll 2.
[0011]
FIG. 2 shows the metal foil 4 obtained by the drilling process. When the metal foil 4 remaining on the grooved roll 2 is peeled off from the roll 2, a perforated foil 4 having a roughly rhombic hole 4c as shown in FIG. 2 is obtained.
[0012]
According to the first embodiment described above, the metal foil 4 is sheared by the grooved roll 2 and the elastic body 3, so that it is less expensive than the conventional press processing method or chemical processing method. A long perforated foil having a high degree of freedom such as the size and pitch of the holes can be manufactured.
[0013]
FIG. 3 shows a manufacturing apparatus according to the second embodiment of the present invention. This manufacturing apparatus 1 has a grooved roll 2 that is disposed to face each other with a predetermined gap and rotates in the direction of the arrow in the figure, and a smooth roll 6 that has a smooth surface. Similar to the first embodiment, grooves 21 are formed in a cross shape on the surface of the grooved roll 2.
[0014]
In the second embodiment configured as described above, the metal foil 4 is inserted over the elastic body 3 between the rotating grooved roll 2 and the smooth roll 6. As a result of pressure processing by the grooved roll 2 and the smooth roll 6, the punched foil 4 a having the holes 4 c formed therein is obtained on the elastic body 3, and the punched residue 4 a sheared by the protrusion 22 of the grooved roll 2 remains. It is done.
[0015]
According to the second embodiment described above, the metal foil 4 is sheared by the grooved roll 2 and the elastic body 3, and the metal foil 4 is sequentially sheared by the grooved roll 2 and the smooth roll 6. Thus, it is possible to continuously produce a long perforated foil that is inexpensive and has a high degree of freedom in terms of hole size, pitch, and the like, as compared with a conventional press working method and a chemical processing method.
[0016]
FIG. 4 shows a manufacturing apparatus according to the third embodiment of the present invention. In the second embodiment, the manufacturing apparatus 1 is configured such that the elastic body 3 is an annular elastic body 3 made of hard rubber having a thickness of 3 mm, and the other configuration is the same as that of the second embodiment. ing.
[0017]
In 3rd Embodiment comprised in this way, if the metal foil 4 is inserted between the grooved roll 2 and the elastic body 3, the rolling process by the grooved roll 2 and the smooth roll 6 will be performed, and 2nd As in the embodiment, the perforated foil 4 in which the holes 4c are formed is obtained.
[0018]
In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible. For example, the metal foil may be other metals such as gold and aluminum other than copper.
[0019]
【The invention's effect】
As described above, according to the method for manufacturing a perforated foil of the present invention, the metal foil is sheared by a grooved roll and an elastic body, thereby comparing with a conventional press processing method or a chemical processing method. Therefore, it is possible to efficiently manufacture a perforated foil having a high degree of freedom such as the size and pitch of holes without incurring high costs.
[Brief description of the drawings]
FIG. 1A is a side view showing a manufacturing apparatus according to a first embodiment of the present invention, FIG. 1B is a cross-sectional view of an essential part, and FIG. 1C is a development view of a roll surface. FIG. 3 is a plan view of the main part of the punched foil obtained by the drilling process of the first embodiment. FIG. 3 is a diagram showing a manufacturing apparatus according to the second embodiment of the present invention. The figure which shows the manufacturing apparatus which concerns on 3rd Embodiment of this
DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus 2 Grooved roll 3 Elastic body 4 Metal foil 4a, 4b Metal foil part 4c Hole 5a Base surface 5 Base plate 6 Smooth roll 21 Groove 22 Projection part θ1, θ2 angle

Claims (5)

In the method for manufacturing a perforated foil that forms holes of a predetermined pattern in a metal foil,
An elastic body that is deformed by pressurization and the metal foil are disposed on a base that is not deformed by pressurization,
A method for producing a perforated foil, wherein the metal foil on the elastic body is pressed by a grooved roll having a groove having a pattern corresponding to the predetermined pattern. The grooved roll includes a plurality of first grooves having a predetermined angle with respect to an axial direction, and a plurality of second grooves having an angle different from the predetermined angle so as to intersect the plurality of first grooves. The method for manufacturing a perforated foil according to claim 1, wherein a groove is formed on the surface. The method for producing a perforated foil according to claim 2, wherein the metal foil is pressed by the grooved roll while being rolled by the grooved roll and a flat roll. The said flat roll is a manufacturing method of the perforated foil of Claim 3 of the structure which formed the said elastic body in the surface. The method for manufacturing a perforated foil according to claim 3, wherein the elastic body has an annular shape and is rotated by the rotation of the flat roll.

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